<descriptor thcode="62"><thesaurus thcode="62" name="Coastal and Marine Ecological Classification Standard" scope="Categories of ecosystems for coastal, estuarine, and marine environments." creator="FGDC" rights="public domain" date="2017-05-10" codetype="alpha" prefix="cmecs" uri="https://www2.usgs.gov/science/CMECS" tblname="cmecs" root_code="root" contact="pschweitzer"><category><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/></category><altlabel><altlabel>CMECS</altlabel><altlabel>CMECS</altlabel><altlabel>Coastal and Marine Ecological Classification Standard (CMECS)</altlabel><altlabel>Coastal and Marine Ecological Classification Standard (CMECS)</altlabel></altlabel></thesaurus><term thcode="62" code="GC-104" name="Hole/Pit" parent="GC-011" scope="Geoform: A generally more steep- sided indentation or depression that is lower than the surrounding surface formed through a variety of processes."/><bt><term thcode="62" code="GC-011" name="Geologic" parent="GC-C052" scope="Geoform Origin: Geologic geoforms are formed by the abiotic processes of uplift, erosion, volcanism, deposition, fluid seepage, and material movement. ..."/><term thcode="62" code="GC-C052" name="Geoform (levels 1 and 2 subcomponents)" parent="GC-C005"/><term thcode="62" code="GC-C005" name="Geoform" parent="root"/><term thcode="62" code="root" name="CMECS" scope="Coastal and Marine Ecological Classification Standard: Category terms encompassing waters from the head of tide or inland incursion of ocean salinity to the splash zone of the coasts to the deepest portions of the oceans and the deep waters of the Great Lakes."/></bt><nt><term thcode="62" code="GC-105" name="Scour Hole" parent="GC-104" scope="Geoform Type: A hole formed by the powerful and concentrated clearing and digging action of flowing air, water, or ice?especially the downward erosion by stream water (in sweeping away mud and silt on the outside curve of a bend) or during the time of a flood."/><term thcode="62" code="GC-106" name="Solution Hole/Pit" parent="GC-104" scope="Geoform Type: An indentation formed on a rock surface by a solution."/></nt></descriptor>